Frank Garrabrant b. ca 1847 NJ

I'm interested in Frank Garrabrant b. ca 1847 NJ.In 1880 he is in Hamilton Co., Tn. with wife, Sarah, 38, step son, Alonzo Martin, 19, and Sarah's niece, Missouri, 22 and nephew, John, 10.Frank and Sarah were married 1/11/1877 in Hamilton Co., Tn.Per the census, Frank's parents were b. in NJ and NY.I'm wondering if Frank died or they divorced soon after the census since Sarah has remarried by 11/1881 in the same county.